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Electrical system
Generator, maintenance
1
Check that the drive belt is not worn and that the
belt tension is correct.
2
Keep the generator clean. When cleaning the gener-
ator, use a material which is moistened with kero-
sene or a fluid which is specially designed for the
purpose. Ensure that the fluid does not enter the
generator.
3
Check that air can pass over the housing to cool it.
Generator, fault-tracing
The generator is constructed so that a current (indi-
cated by an unlit warning lamp or a value on a volt-
meter) shows that the system is operating correct-
ly. If the system is operating correctly, no check is
required of open circuits, voltage or current output
on the unit unless:
• The warning lamp does not light when the gen-
erator is not running and the switch is in the ON
position, or it lights when the generator is run-
ning.
• No charge current is shown on the voltmeter.
• The battery is discharged.
• The battery is warmer than normal, which sug-
gests that the voltage control is not operating.
If one or more of the above symptoms occur, the
following action must be taken.
1
Check that the battery is charged.
2
Connect a good-quality voltmeter with a range of 0-
50 V across the generator and the negative termi-
nals.
If an ammeter is not connected in the circuit: Con-
nect a good-quality ammeter with a range of 0-100
A to the lead between the generator and the battery
positive terminal.
3
Turn the switch for the warning lamp to the ON po-
sition (the main switch on the instrument panel).
The warning indicator should come on.
4
Connect a load of 10-15 A, e.g. lighting.
5
Start the engine and run it at high idling speed, at
which time either: the warning lamp will go out or
the ammeter will show a low charge current in rela-
tion to the engine speed.
6
Increase the engine speed for a short time to almost
max rpm; the charge current should be approxi-
mately 50 A.
7
Run the engine at approximately half max rpm and
remove the electrical load.
The voltage should increase to 14 V for a 12 V sys-
tem and then remain constant. At the same time,
the current indicator should show a fall.
Any change in the above data may indicate a fault
and the generator must be removed to be checked
by a specialist.
The governor is a sealed unit and repairs are not
possible. If the governor is faulty it must be re-
placed.
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